HTTPS (SSL/TLS) and Let's Encrypt
The green lock icon in the browser location bar is displayed when a website is considered â€œsecureâ€ by the browser. A trend online has been to push all sites to adopt securing their site, even if there is no need for security. One historical reason the internet has not had a green lock icon on every site is that it has been prohibitively expensive to secure a website, with quite a bit of manual work to implement the security as well.
Letâ€™s Encrypt was founded by a few employees of large organizations and companies to help move the entire internet to a secure state. Today Letâ€™s Encrypt provides free HTTPS (SSL/TLS) certificates therefore removing the cost of securing a website. They even provide free software (Certbot) to help automate the installation and maintenance of the certificates.
Letâ€™s Encrypt was founded by Electronic Frontier Foundation (EFF), Mozilla Foundation (makers of the FireFox browser), University of Michigan, Akamai Technologies and Cisco Systems. More can be read about Letâ€™s Encrypt on Wikipedia: https://en.wikipedia.org/wiki/Let's_Encrypt
SSL, TLS and HTTPS
HTTP is Hyper Text Transport Protocol, to simplify what this is, itâ€™s the language which allows all the computers and devices to share information over the internet. HTTPS is HTTP Secure, the â€œsecureâ€ part implies that no one can monitor or alter the communication between your device and the originating provider of the information you are accessing.
The â€œSâ€ in HTTPS in common language demonstrates that the site has an â€œSSL certificateâ€, but thatâ€™s not particularly accurate. SSL is Secure Sockets Layer, and despite being a commonly used term, is no longer actually used and is considered insecure. TLS is Transport Layer Security, and has replaced the SSL protocol.